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Building Technologies
Bus operator unit RMZ792
CE1P3113en
HVAC Products
4 Power supply
03.04.2006
4 Power
supply
The bus operator unit can be powered in 3 different ways:
•
Via Konnex bus (45 mA)
•
Via an external power source (AC 24 V)
•
Via the service interface of a Synco™ controller (not recommended)
•
When using the cable supplied with the bus operator unit, plug correctly the RJ45
connector into the appropriate socket of the RMZ792 (audible click)
•
Move the KNX / EXT slide switch for selecting the type of power supply to its end
position
4.1
Power supply via Konnex bus
•
If the bus operator unit is used in a location where AC 24 V power supply is not
available (mobile use, installation in some other space), the unit can be powered via
the Konnex bus
•
Power supply must be such that 45 mA are available for the bus operator unit. This
necessitates at least 2 active decentral bus power supplies via Synco™ controllers
or 1 central bus power supply
•
The slide switch at the rear of the bus operator unit must be set to KNX
•
Using the cable supplied with the unit, the RMZ792 is to be connected to a Konnex
bus socket (figure a)
or
a Synco™ controller (figure b)
•
The Konnex bus cable is to be connected to terminals CE+ and CE– on the base
(figure c; observe polarity)
a)
b)
c)
KNX
S
KNX
CE+
G0
G
CE
KNX TP1
45 mA
S1
X1
S
KNX
CE+
G0
G
CE
31
1
3
A
0
5
Synco RM...
KNX TP1
45 mA
S1
N1
KNX
31
1
3
A
0
7
KNX
S
KNX
CE+
G0
G
CE
KNX
45 mA
S1
KNX Konnex
bus
N1
Synco™ 700 controller
S1
Bus operator unit RMZ792
X1 Bus
socket
4.2
External power supply
•
External AC 24 V power supply is recommended in the case of fixed installations
(e.g. in the control panel door). This means that the decentral / central bus power
supply does not have to carry the load of the bus operator unit and can be used for
powering other bus users
•
The slide switch at the rear of the bus operator unit must be set to EXT
•
AC 24 V is supplied to the bus operator unit via terminals G and G0
31
1
3
A
0
2
KNX
S
EXT
CE+
G0
G
CE
KNX
SP
SN
A
C
24 V
Notes
